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- The Half-life of Pennies Lab Can you use pennies to demonstrate "decay? Imagine existing more than 5,000 years and still having more than 5,000 to go! That is exactly what the unstable element carbon-14 does. Carbon-14 is a special unstable element used in the absolute dating of material that was once alive, such as fossil bones. Every 5,730 years, half of the carbon-14 in a fossil specimen decays or breaks down into a more stable element. In the following lab you will see how pennies can show the same kind of "decay." Materials • 100 pennies • large container with a cover Procedure a. Place 100 pennies in a large, covered container. Shake the container several times and remove the cover. Carefully empty the container on a flat surface, making sure the pennies don't roll away. b. Remove all the coins that have the "head" side of the coin turned upward. Record the number of pennies removed and the number of pennies remaining in the data table below. Shake number Number of coins removed…What is mole?Please write the whole solution on a piece of paper , much appreciated
- QUESTION 7 (Start on a new page.) The airbags in motor vehicles contain the compound sodium azide (NaNs). When a car crashes into an object, the compound decomposes and the nitrogen inflates the airbag. The balanced equation for the reaction is as follows: NaN(s) → 2Na(s) + 3N2(g) In one such decomposition, 2,53 x 10° molecules of nitrogen are generated. Calculate the: 7.1 Number of moles of NaN(s) that decomposed 7.2 Volume of N2(g) produced Assume that the reaction occurs at standard pressure. QUESTION 8 (Start on a new page.) Aluminium sulphate is used as a coagulant in water purification. It reacts with sodium hydroxide to form aluminium hydroxide which drags the impurities as it settles. The balanced equation for the reaction is: Al2(SO4)3(aq) + 6NaOH(aq) → 2Al(OH)3(s) + 3Na2SO4(aq) A chemist at a water purification plant adds 700 g of Al2(SO4)3 to a sample of water. 8.1 Calculate the maximum mass of Al(OH)3 that can be produced from this mass of Al2(SO4)3. (4) E [7] (5) The…06:03 Tue 14 Apr e 63% AA A edugen.wileyplus.com Solutions to Chemistry (9780073402680), Pg. 109,. specialized torch 2.0 - Google Shopping х WileyPLUS size 5.5 uk in eu - Google Search WileyPLUS: MyWileyPLUS | Help | Contact Us | Log Out WileyPLUS Halliday, Fundamentals of Physics, 11e INTRO TO MECHAN, & ELEC & MAGNETISM (PHYS 1303, 1304, 1307 &1308) Home Read, Study & Practice Assignment Gradebook ORION Downloadable eTextbook Assignment > Open Assignment FULL SCREEN PRINTER VERSION 1 BACK NEXT ASSIGNMENT RESOURCES Chapter 32, Problem 060 PHYS 1304 HWK 11 (Spring 2020) M Chapter 32, Concept Question 03 A magnetic flux of 9.9 mWb is directed outward through the flat bottom face of the closed surface shown in the figure. Along the flat top face (which has a radius of 2.0 cm) there is a 0.50 T magnetic field B directed perpendicular to the face. What is the magnitude of the magnetic flux through the curved portion of the surface? M Chapter 32, Concept Question 02 M Chapter 32, Problem 069…Is that -4 or -9